Systems and methods for transmitting data using near field communications

A data exchange system comprising a device memory module, a device antenna, a device transceiver system comprising a device transceiver module and a device antenna, a power manager, a first switch operable in a first state and a second state, and a power supply for providing power to the device memory module, the device transceiver, and the power manager. When the first switch is in its first state, the device memory module and the device transceiver do not consume sufficient power from the power supply to allow the transfer of data between the device memory module and the host memory. When the first switch is in its second state, the device memory and the device transceiver consume sufficient power from the power supply to allow the transfer of data between the device memory module and the host memory using the host transceiver system.